ABB RELION REX640 Technical Manual page 751

1MRS759142 C
REX640
Technical Manual
Min reverse
angle
Backward
area
Max reverse
angle
GUID-D2B2E8AB-4C2F-42D3-B00D-F0622D3E1540 V1 EN
Figure 410: Configurable operating sectors
The angle difference ANGLE between the negative-sequence current and the
polarizing quantity is calculated as shown below and is available in the Monitored data
view.
ANGLE U I
φ φ
( 2 ) ( ) 2
= − −
GUID-BF3DB4ED-05B7-4B64-B1BB-C2E922C3D635 V1 EN
Based on the ANGLE value, the direction information DIRECTION is evaluated and
is made available in the Monitored data view.
Table 671: Momentary direction value for monitored data view
Criterion for direction information
ANGLE is not in any of the defined sectors, or the
direction cannot be defined due to low amplitude.
ANGLE is in the forward sector.
ANGLE is in the reverse sector.
FAULT_DIR gives the detected direction of the fault during fault situations, that is,
when the START output is active.
-U
2
RCA = + 60 deg
Max forward
angle
I
Forward
area
φ
RCA
−
Value for DIRECTION
0 = unknown
1 = forward
2 = backward
Section 4
Protection functions
2
Min forward
angle
(Equation 189)
745